A new lower bound for a rational approximation on the positive real axis
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摘要
Erdös and Reddy (Adv. Math. 21 (1976) 78) estimated the lower bound in question to be 2.75−1, but their proof was incorrect. We obtain the optimal bound e−1. It is interesting to remark that 2.75−1 is very close to e−1.
论文关键词:41A20,41A44,Rational approximation,Entire functions
论文评审过程:Received 1 November 1999, Revised 1 March 2000, Available online 3 August 2001.
论文官网地址:https://doi.org/10.1016/S0377-0427(00)00658-0